Chemistry How to Find Initial Moles of Reactants for Given Reaction | Moles Homework

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To find the initial moles of reactants in the reaction H2O2 + 2I- + 2H+ → 2H2O + I2, the formula n = C x V is used, where n is the number of moles, C is concentration, and V is volume. For potassium iodide, with a volume of 10 mL and concentration of 0.2 mol/L, the initial moles can be calculated directly without considering stoichiometric coefficients. Similarly, for sulfuric acid and hydrogen peroxide, their respective volumes and concentrations lead to their initial moles using the same formula. It is emphasized that the coefficients are not needed for this calculation, focusing solely on the concentration and volume. Understanding this approach is crucial for accurately determining the initial moles of each reactant.
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Homework Statement



We are given a reaction: H2O2 + 2I- + 2H+ → 2H2O + I2 and are asked to find the initial number of moles of each reactant.

V=10mL and C=0.2 mol/L for potassium iodide in the solution.
V=5mL and C=0.5 mol/L for sulfuric acid in the solution.
V=5mL and C=0.02 mol/L for hydrogen peroxide in the solution.


Homework Equations



n=CxV where n is the number of moles, C is the concentration, and V is the volume.

The Attempt at a Solution



I know we need to use the equation stated above but should we multiply by the coefficient or not?
 
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You mean stoichiometric coefficients? No, just calculate concentration as if you were not knowing what the solution will be used for.
 

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